Stray Cat Strut [Stubbing Never - lol] - Chapter Fifty-Seven - In Space No One Can Hear You Buzz

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

In the 21st century, a young judge time-travels to another world.Here, martial arts are evergreen, and myriad schools compete for dominance.Confucianism: Immense righteousness, impervious to all laws.Legalism: The power of rules, the law follows the word.Military strategists: The power of conquest, invincible in battle.Mohism: Ingenious mechanics, ordinary humans rivaling gods.Yin-Yang school: Numerology and the five elements, seeking divination, pursuing good fortune, and avoiding disaster....What's this? The Legalists grow stronger by adjudicating cases?Li Nuo, who has just vowed to advocate for the people and eliminate the corrupt, discovers that his father is the greatest villain in the court.Faced with countless enemies seeking revenge against his father, Li Nuo says he only needs one sentence.'My lady, guard me!'

She is the eldest daughter of the Zanying family, born noble, beautiful and beautiful, with a peerless appearance;

In the last life, she gave everything she had to help him win the world, but in return she got all her family killed;

In the last life, the person who killed her ascended to the throne of the phoenix, the mother of the world, the honor and wealth, but she was imprisoned in the cold palace and suffered all kinds of humiliation;

Reborn in elementary school, she is no longer a pawn at the mercy of others, she is the best in the world in medical skills, and she has a delicate heart to plan and plan the world;

In this life, she wants to protect her dear ones, to avenge her revenge, and to avenge her grudges;

In this life, she wants that young man who rides his horse and sings lightly, regardless of sword, light or sword, to live a long and safe life!

- Description from novelbuddy

A pair of young girls that appear to be the same age act like a mother and a daughter. They are on a journey for one reason: to obtain a medicine that will stave off the daughter’s disease. Killing demons, deceiving people, and giving her everything in hope that there’s a way of rescuing her daughter. This is the story of their fragile hope and overwhelming despair.